Measurement and modeling of sound propagation over continental slope in the South China Sea

Jin Liu; Zhaohui Peng; Zhenglin Li; Wenyu Luo; Xishan Yang

doi:10.1121/10.0000801

Measurement and modeling of sound propagation over continental slope in the South China Sea

J Acoust Soc Am. 2020 Mar;147(3):EL209. doi: 10.1121/10.0000801.

Authors

Jin Liu¹, Zhaohui Peng¹, Zhenglin Li¹, Wenyu Luo¹, Xishan Yang¹

Affiliation

¹ State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, Chinaliujin@mail.ioa.ac.cn, pzh@mail.ioa.ac.cn, lzhl@mail.ioa.ac.cn, lwy@mail.ioa.ac.cn, yangxishan@mail.ioa.ac.cn.

PMID: 32237814
DOI: 10.1121/10.0000801

Abstract

Measurements along two ship tracks were obtained in an experiment to investigate the properties of acoustic propagation over the continental slope in the South China Sea. The measured data show a notable difference in transmission loss about 35 dB as sound crosses different geodesic paths. Numerical simulations indicate that the range and azimuth-dependent geological properties control the level of the transmission loss and lead to this large transmission loss fluctuation. In addition, the model also suggests some small-scale features of horizontal refraction effect caused by irregular topography, but they are not observed in the measured data.